Linux Kernel Null Pointer Dereference Vulnerability in Display Driver

CVE-2025-39820

What is CVE-2025-39820?

A vulnerability in the Linux kernel's display driver pertaining to a null pointer dereference has been detected. This issue occurs within the drm_atomic_get_new_connector_state() function, which can return a NULL value when a connector is absent from the atomic state. This inadequacy can lead to system instability if not handled correctly. To address this, a null pointer check has been introduced, mirroring the implementation already established in the dpu_encoder_update_topology() function. This crucial addition prevents potential dereference of a NULL pointer, bolstering system reliability and security.

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